Hydroxyethyl cellulose (HEC) is a non-ionic cellulose ether widely used in various industrial applications due to its versatile properties. Derived from natural cellulose, HEC is synthesized by the reaction of ethylene oxide with cellulose, resulting in a compound that is soluble in water at ambient temperatures. This solubility, along with its thickening, film-forming, and emulsifying properties, makes HEC a valuable ingredient across multiple sectors, including pharmaceuticals, food, cosmetics, and construction.